Alien Icon Fixed and revamped
Fixed icons not disappearing on embryo removal

Basically for whatever reason I did not see affected mob was a variable
and instead used loc for determining the mob affected by the embryo
Changed it to use affected mob, which actually should fix a lot of
fringe cases where the icon would not remove the correct icon
Some more absolute paths for some gamemode files
Absolute paths for some machinery files.
Merge branch 'master' of https://github.com/tgstation/-tg-station.git into somemorefileabsolutes
Thanks MIAUW!
Merge pull request #4351 from Firecage/somemorefileabsolutes

Some more absolute paths for some gamemode files
Merge pull request #4353 from Firecage/machineryabsolutes

Absolute paths for some machinery files.
Merge pull request #4307 from Zelacks/alienimagefix

Fix for Alien Infection Image
Merge branch 'master' of https://github.com/tgstation/-tg-station.git into Structureabsolutes